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gl_engine: luma visual differneces fix

Browse source 
https://github.com/thorvg/thorvg/issues/3045
This commit is contained in:
Sergii Liebodkin 2025-03-20 21:56:01 +00:00 • committed by Mira Grudzinska
parent 7730b1d632
commit 72a1b0339b
1 changed files with 3 additions and 4 deletions
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7
src/renderer/gl_engine/tvgGlShaderSrc.cpp
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@ -442,7 +442,7 @@ void main() { \n
const char* MASK_LUMA_FRAG_SHADER = TVG_COMPOSE_SHADER(
uniform sampler2D uSrcTexture; \n
uniform sampler2D uMaskTexture; \n
\n
\n
in vec2 vUV; \n
\n
out vec4 FragColor; \n
@ -455,8 +455,7 @@ void main() {
maskColor = vec4(maskColor.rgb / maskColor.a, maskColor.a); \n
} \n
\n
FragColor = \n
srcColor * (0.299 * maskColor.r + 0.587 * maskColor.g + 0.114 * maskColor.b) * maskColor.a; \n
FragColor = srcColor * dot(maskColor.rgb, vec3(0.2125, 0.7154, 0.0721)) * maskColor.a; \n
} \n
);
@ -472,7 +471,7 @@ void main() {
vec4 srcColor = texture(uSrcTexture, vUV); \n
vec4 maskColor = texture(uMaskTexture, vUV); \n
\n
float luma = (0.299 * maskColor.r + 0.587 * maskColor.g + 0.114 * maskColor.b); \n
float luma = dot(maskColor.rgb, vec3(0.2125, 0.7154, 0.0721)); \n
FragColor = srcColor * (1.0 - luma); \n
} \n
);